How to stop Blender from slowing down zooming and panning?
I know this post is very old, but what I do is if I want to work up close, I switch to object mode, deselect everything, zoom in about where I want to be, then go back into edit mode. The zoom scale is reset from that point. So basically, the zoom scale will always be there, but wherever it starts is wherever you go into edit mode with nothing selected.